GB499449A - Telephone receiver - Google Patents

Telephone receiver

Info

Publication number
GB499449A
GB499449A GB7969/38A GB796938A GB499449A GB 499449 A GB499449 A GB 499449A GB 7969/38 A GB7969/38 A GB 7969/38A GB 796938 A GB796938 A GB 796938A GB 499449 A GB499449 A GB 499449A
Authority
GB
United Kingdom
Prior art keywords
unit
ring
receiver
polepieces
march
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7969/38A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALFONS EMIL RAPPENECKER
Original Assignee
ALFONS EMIL RAPPENECKER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ALFONS EMIL RAPPENECKER filed Critical ALFONS EMIL RAPPENECKER
Publication of GB499449A publication Critical patent/GB499449A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Telephone Set Structure (AREA)
GB7969/38A 1937-03-16 1938-03-15 Telephone receiver Expired GB499449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH499449X 1937-03-16

Publications (1)

Publication Number Publication Date
GB499449A true GB499449A (en) 1939-01-24

Family

ID=4516866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7969/38A Expired GB499449A (en) 1937-03-16 1938-03-15 Telephone receiver

Country Status (2)

Country Link
CH (1) CH194900A (de)
GB (1) GB499449A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938073C (de) * 1952-06-21 1956-01-19 Canadian Benaudi Comp Ltd Telefonzusatzhoerer
DE957231C (de) * 1953-02-22 1957-01-31 Standard Elek K Ag Zusatzhoerer fuer Fernsprechstationen
DE1112118B (de) * 1958-08-29 1961-08-03 Siemens Ag Hoerer, insbesondere Zweithoerer fuer Fernsprechstationen

Also Published As

Publication number Publication date
CH194900A (de) 1937-12-31

Similar Documents

Publication Publication Date Title
GB604159A (en) Improvements in or relating to acoustic transducers
GB746773A (en) Improvements in electroacoustic devices
GB499449A (en) Telephone receiver
GB686743A (en) Improvements in loud speakers
GB653923A (en) Improvements in or relating to electro-acoustic transducers
GB851938A (en) Improvements in and relating to electro-acoustical transducers
GB552328A (en) Improvements in or relating to loud speakers and the like
GB375538A (en) Loud speaker
GB1055747A (en) Electro-acoustic transducers
GB491509A (en) Improvements in or relating to electrodynamic receivers of small size
GB857413A (en) Improvements in or relating to cone loudspeakers
GB686934A (en) Improvements in and relating to moving coil loudspeakers
GB725182A (en) Improvements in or relating to moving coil loudspeakers
US2503857A (en) Polarized electromagnet for telephone instruments
GB377141A (en) Improvements in or relating to electrodynamic loudspeakers
GB547728A (en) Improvements relating to electromagnetic telephone instruments
GB721325A (en) Improvements relating to electro-dynamic sound reproducers of the moving coil type
GB886757A (en) Improvements in or relating to electro-mechanical transducers
GB965591A (en) Improvements in or relating to electro-acoustic converters
GB767309A (en) Improvements in or relating to moving coil type loudspeakers
GB709656A (en) Improvements in electrodynamic sound receiving and transmitting apparatus
GB696852A (en) Improvements in or relating to loudspeakers and the like
GB275161A (en) Improvements in and relating to loud speakers
GB533913A (en) Improvements in or relating to loud speaking telephone receivers
GB452420A (en) Improvements in and relating to electroacoustic apparatus